Merge pull request #271 from dereuromark/php81

Check PHP 8.1

.gitattributes

@@ -20,3 +20,5 @@ phpunit.xml.dist export-ignore
 .gitattributes export-ignore
 .editorconfig export-ignore
 tests/test_app export-ignore
+.github/ export-ignore
+

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: ['7.3', '8.0']
+        php-version: ['7.3', '8.1']
         db-type: [sqlite, mysql, pgsql]
         prefer-lowest: ['']
         include: